I wrote the following message about mission reward tanks in the Obj. 260 armor buff thread and realised...that nobody realised this before...:

I think they were good when they first got put into the game... but the game's changed and they remain untouched, T-54 got a turret buff recently while the T55A's turret remains the same, T28 HTC needs a traverse buff like the T28/T95 had recently. IS-7 got buffed and now has 300 more hitpoints than the Obj. 260...

Wargaming, you forgot to buff the reward tanks with the rest of the similar tanks from their trees! WHAT ARE YOU DOING???

The only one that hasn't had its similar version changed is the StuG IV, because you never change lower tiers...good in this case, but you've forgotten the others...